Artists who've never won a Grammy but still could... or should
Bjork, Snoop Dogg, Katy Perry, The Beach Boys and others deserve some explanations
Mos Def (AKA Yasiin Bey)
Number of times nominated: 6 (including his work with Gorillaz)
Music lesson: The worldly rapper-actor has released impressive solo albums and teamed with Talib Kweli for their well-received Black Star collaboration. But the Grammy has proved elusive so far.